Closure structure



1957 G. c. EVANS 2,808,174

CLOSURE STRUCTURE Filed Feb. 1, 1954 mums; i1; WM

United States Patent CLOSURE STRUCTURE Glenn C. Evans, Fort Dodge, Iowa Application February 1,, 1954,,S'crial' No. 407,511

4 Claims. (Cl. 220-25) This invention relates to hole closing means and more particularly to devices for closing, the: core holes in the engine blocks of water cooled internal combustion en.- gines The engines of passenger automobiles and trucks at time of manufacture have a number of casting or core holes in their blocks. Most everyone considers these openings as safety ones inasmuch as they are closed by a friction press cap or disc which are. easily knocked out. However, such is not the purpose of such closing caps and their use; is merely a cheap means for closing the core holes. Often these press cap plugs become accidentally detached resulti'ngin serious damage to the engine. Also in the repair or cleaning of the engine, they must be removed and replaced. This, however, is often most difficult and especially in the replacement of a new one, due torthe compactness of present engines within the engine compartment of the vehicle. Some of these core holes are almost inaccessible for the drive press fitting of a new cap plug. Also, such press cap plugs often leak.

Therefore, the principal object of my invention is to provide a mechanical core plug that may be easily installed orremoved without hammering or press fitting the same.

A further object of this invention is to provide a mechanical core plug that can easily be installed at locations where there is only little workspace;

A still further object of my invention is to provide a core plug that does not leak.

Still further objects of my invention are to provide a mechanical core plug that is economical in manufacture and durable in use.

These. and other objects will be apparent to those skillediu the art.

My'invention consists in the construction, arrangement, and combination of the various parts of the device, whereby the object's contemplated are attained as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Fig: l is a perspective exploded View of the various parts of my device,

Fig. 2 is an outside view of' the device installed,

Fig. 3 is a side sectional view of the device illustrating its placement in or removal from a core hole,

Fig. 4 is a cross-sectional view of the installed device taken on line 4-4 of Fig. 2, and

Fig. 5 is a cross-sectional view of the installed device taken on line 5--5 of Fig. 4 and more fully illustrates its construction.

Referring to the drawings in detail, I have used the numeral to designate the wall of an engine block. The numeral 11 designates a core hole in the engine block wall. Such core holes have a larger shouldered recess 12 on the outer side of the wall as shown in Fig. 3. It is to such a core hole that I use my sealing device and which I will now describe in detail.

The numeral 13 is used to generally designate an anchor head. This anchor head 13 is of simple construction and is formedt'rom an ordinary washer, by bending. two of its side portions at each. side of its hole 14' upwardly to form the two spaced ear portions 15 and 16. By this construction, the two car portions 15 and 16 will have their outer edges curved and extending in substantially a half circle as shown in Fig. 4.- This curve:- ture of the two spaced apart ear portions 15 and 16 is of importance in the successful operation of my device and which will later be described. 1 Inthe outer center marginal edge portion of each of the ears 15 and 16. l"; have cut a rectangular notch 17 to receive the head 18 of a bolt 19 as shown in Fig. 1. The threaded stem of the bolt 19 extends through the hole 14' of the washer head 13. With the retangular head 18 of the bolt within the rectangular notches 17 .of' the ear portions15'and 1'6, thebolt will be prevented from independent rotation relative to the head 13 and by press fitting the head 18 of the bolt 19 into the notches 17, the bolt and head portion 13' becomes one unit for all intents and purposes. .The numeral 20 designates a washer gasket designed to rest within the shouldered recess 12 of the engine block. The numeral 21 designates a washer curved outwardly at its center portion and having a diameter greater than the diameter of the inner. corehole 1-1, but. of a diameter slightly lessthan that of the diameter of the shouldered recess 12. The numeral 22 designates an internally threaded nut adapted to be threaded onto the shank of the bolt 19 and having an inwardly extending cylindrical barrel portion 23 as shown in Fig. 1'. The hole 24 in the. dome washer cap 21 is of such diameter that the cylindrical portion 23 loosely extends. through the same as shown in Fig. 5. The numeral ZS; designates a washer gasket between the outer side of the-dome cap washer 21 and the head of the nut portion 22.

The practical operation of my device. is. as follows. With the unit assembled as shown in Fig. 3 and with the nut 22.unscrewedito. a point. where the. barrel portion 23 is barely engaging the threads of the bolt 19, the anchor head portion 13 is placed within the core opening where one end ofthe head 13 is in, back and beyond the core hole 11. This first movement. in the installtion of the device is illustrated in Fig. 3. At this point of insertion, the bolt 19' will be extending at an acute angle. to the wall of the engine block and merely by bringing the bolt 19 downwardly and to a. transverse position relative to the engine wall, the anchor head 13 will rotate to a position inside the engine block. Thus it will be seen that the length diameter of the anchor head 13. is greater than that of' the inside diameter of the core hole. 11. The rotation of the anchor head. 13. to a. position inside the engine. block is made possible by the important feature of having the two car portions 15 and 16' curved, i. e.,.the peripheries of the. ears. 15 and 16. cutthe. arc of a circle. Once; the anchor headportion 13 is. on. the inside of the engine wall with the two. length ends. of the. anchor head overlapping the core hole 11,. ibis merely necessaryto. tighten the nut 22, thereby bringing the sealing cap 21 into setting position within the recess 12 as shown in Fig. 4. With the nut 22 thus tightened, the core hole will be successfully closed and sealed against leakage and against accidental opening. By bending the ears 15 and 16 outwardly and parallel with each other, the anchor head due to such right angle bends is most strong, although the washer from which it is made may be of relatively light sheet metal. By making the sealing cap 21 of dome shape, it also is of substantial strength. The gaskets 20 and definitely seal the core hole against leakage.

To remove the device it is merely necessary to substantially unthread the nut 22 and rotate the anchor head 13 out of the core hole 11. My device not only successfully seals the core hole, but may be installed or removed c3 easily and quickly and even when the work space adjacent the outer side of the core hole is most limited.

Although I have described my device for use in the closing of core holes, the device can be usedto advantage for other purposes, not only wherein it is desired to close an opening, but to anchor one end of a bolt extending through an opening in any type of wall structure.

Some changes may be made in the construction and arrangement of my quick attachable and detachable core hole closing device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. In combination, a wall member having a hole therein, an anchor member having an apertured elongated flat portion of a length greater than the diameter of the hole in said wall member residing diametrically across said hole on one face of said wall and in flat-wise engagement therewith, two rounded spaced apart ears secured to the side edges of said elongated flat portion and extending away from said wall and flat portion at right angles thereto, a notch cut in the rounded portion of each of said ears, a bolt having a head on one end thereof, said bolt extending through the aperture of the elongated flat portion of the anchor member and having its head disposed in the notches in said two ears, said bolt also extending through the hole in the wall member and projecting beyond the face of the wall remote from the anchor member, a centrally apertured hollow domeshaped sealing cap positioned against the face of said wall remote from the anchor member in covering relation to the hole of said wall with the aperture of said cap receiving said bolt and a nut on said bolt disposed on the side of said cap remote from said anchor for tightening the sealing cap into sealing relation across said wall hole.

2. In combination, a wall member of a closed container, a hole in said wall member, an anchor member having an apertured elongated flat portion of a length greater than the diameter of the hole in said Wall member residing diametrically across said hole on the inside face of said Wall and in flat-wise engagement therewith, two rounded spaced apart ears secured to the side edges of said elongated flat portion and extending away from said wall and fiat portion at right angles thereto, a notch cut in the rounded portion of each of said ears, a bolt having a head on one end thereof, said bolt extending through the aperture of the elongated flat portion of the anchor member and having its head disposed in the notches in said two ears, said bolt also extending through the hole in the wall member and projecting beyond the face of the wall remote from the anchor member, a centrally apertured hollow dome-shaped sealing cap positioned against the face of said wall remote from the anchor member in covering relation to the hole of said wall with the aperture of said cap receiving said bolt and a nut on said bolt disposed on the side of said cap remote from said anchor for tightening the sealing cap into sealing relation across said wall hole.

3. In combination, a wall member having a hole therein, an anchor member having an apertured elongated fiat portion of a length greater than the diameter of the hole in said wall member residing diametrically across said hole on one face of said wall and in flat-wise engagement therewith, two rounded spaced apart ears secured to the side edges of said elongated flat portion and extending away from said wall and flat portion at right angles thereto, a notch cut in the rounded portion of each of said ears, a bolt having a head on one end thereof, said bolt extending through the aperture of the elongated flat portion of the anchor member and having its head disposed in the notches in said two ears, said bolt also extending through the hole in the wall memberand projecting be yond the face of the wall remote from the anchor mem her, a centrally apertured sealing cap positioned against the face of said wall remote from the anchor member in covering relation to the hole of said wall with the aperture of said cap receiving said bolt and a nut on said bolt disposed on the side of said cap remote from said anchor for tightening the sealing cap into sealing relation across said wall hole.

4. in combination, a wall member of a closed container, a hole in said wall member, an anchor member having an apertured elongated flat portion of a length greater than the diameter of the hole in said wall member residing diametrically across said hole on the inside face of said wall and in flat-wise engagement therewith, two rounded spaced apart ears secured to the side edges of said elongated flat portion and extending awayfrom said wall and flat portion at right angles thereto, a notch cut in the rounded portion of each of said ears, a bolt having a head on one end thereof, said bolt extending through the aperture of the elongated flat portion of the anchor member and having its head disposed in the notches in said two ears, said bolt also extending through the hole in the Wall member and projecting beyond the face of the wall remote from the anchor member, a centrally apertured cap positioned against the face of said wall remote from the anchor member in covering rela: tion to the hole of said wall with the aperture of said cap receiving said bolt and a nut on said bolt disposed on the side of said cap remote from said anchor for tightening the sealing cap into sealing relation across said Wall hole.

References Cited in the file of this patent UNITED STATES PATENTS 

